﻿//
//
//

namespace Microsoft.OpenTurf.Silverlight
{
    using System;
    using System.Collections.Generic;
    using System.Windows;
    using GalaSoft.MvvmLight.Messaging;
    using Microsoft.OpenTurf.Silverlight.Common;

    public partial class App : Application
    {
        public string BaseUrl { get; private set; }

        public App()
        {
            this.Startup += this.Application_Startup;
            this.Exit += this.Application_Exit;
            this.UnhandledException += this.Application_UnhandledException;

            InitializeComponent();
        }

        private void Application_Startup(object sender, StartupEventArgs e)
        {
            if (e.InitParams == null)
                throw new ArgumentNullException("You must supply the application with an ATOM document of Feeds in which to subscribe to");

            Dictionary<string, string> feedSources = new Dictionary<string, string>();

            BaseUrl = App.Current.Host.Source.Host;
            int port = App.Current.Host.Source.Port;

            if (!BaseUrl.StartsWith("http://"))
                BaseUrl = "http://" + BaseUrl;

            if (port != 80)
                BaseUrl += ":" + port;

            if (!BaseUrl.EndsWith("/"))
                BaseUrl += "/";

            // Load all the Sources into the Dictionary
            foreach (var item in e.InitParams)
            {
                var key = item.Key;
                var value = item.Value;

                if (value.Contains(".xml"))
                {
                    feedSources.Add(key, BaseUrl + value);
                }
            }

            // Set the MainView to the RootVisual
            this.RootVisual = new MainView();

            // Send the Feed Sources to the MainViewModel
            Messenger.Default.Send<Dictionary<string, string>>(feedSources, NotificationTokens.LoadDataSources);
        }

        private void Application_Exit(object sender, EventArgs e)
        {

        }

        private void Application_UnhandledException(object sender, ApplicationUnhandledExceptionEventArgs e)
        {
            // If the app is running outside of the debugger then report the exception using
            // the browser's exception mechanism. On IE this will display it a yellow alert 
            // icon in the status bar and Firefox will display a script error.
            if (!System.Diagnostics.Debugger.IsAttached)
            {

                // NOTE: This will allow the application to continue running after an exception has been thrown
                // but not handled. 
                // For production applications this error handling should be replaced with something that will 
                // report the error to the website and stop the application.
                e.Handled = true;
                Deployment.Current.Dispatcher.BeginInvoke(delegate { ReportErrorToDOM(e); });
            }
        }

        private void ReportErrorToDOM(ApplicationUnhandledExceptionEventArgs e)
        {
            try
            {
                string errorMsg = e.ExceptionObject.Message + e.ExceptionObject.StackTrace;
                errorMsg = errorMsg.Replace('"', '\'').Replace("\r\n", @"\n");

                System.Windows.Browser.HtmlPage.Window.Eval("throw new Error(\"Unhandled Error in Silverlight Application " + errorMsg + "\");");
            }
            catch (Exception)
            {
            }
        }
    }
}
